The moon sets over central Illinois trees showing their Fall colors Tuesday, Oct. 2, 2012 in Springfield, Ill. Fall started last week and the leaves are trying to catch up. The Iowa Department of Natural Resources says the drought and heat caused some trees to lose their leaves early. But now with cooler temperatures, the Fall colors could last through October.

Credit: AP Photo/Seth Perlman

Leaves along the Androscoggin River are at peak color, Friday, Sept. 28, 2012 in Berlin, N.H.

Credit: AP Photo/Jim Cole

As summer comes to an end, the color and beauty of autumn is already visible in the colorful leaves around LaPorte, Ind., as a light rain falls Friday Sept. 21, 2012. Fall officially began at 10:49 a.m. EDT Saturday, Sept. 22, 2012.

Jim Kohl of Madison, Wis., walks along Arboretum Drive on the west end of the University of Wisconsin Arboretum into a field of early fall color in Madison, Wis., Wednesday, Sept. 26, 2012. Kohl said he has been walking in the Arboretum 3-4 times a week since he retired in 1986.

Credit: AP Photo/Wisconsin State Journal, M.P. King

Two unicyclists ride under fall leaves along a bike trail by Minnesota Drive on Monday, Sept. 24, in Anchorage, Alaska.

Credit: AP/Dan Joling

A scenic view of byways in North Carolina.

Credit: Bill Russ/visitnc.com

The trees are beginning to change color on Saturday, Sept. 29, 2012, on Natchez Trace Parkway in Williamson County, Tenn. The fall foliage season is expected to be colorful in much of the Southeast.

Credit: AP Photo/Teresa Wasson

As summer comes to an end, the color and beauty of autumn is already visible in the colorful leaves that provide a backdrop for these bloom wildflowers in LaPorte, Ind., as a light rain falls Friday, Sept. 21, 2012.

Credit: AP Photo/Bob Wellinski, LaPorte Herald Argus

A girl throws leaves in the air as she poses for the photographer at the estate of Mariendaal in Arnhem, the Netherlands, on September 30, 2012.

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Fall colors are in force on Tuesday, Sept. 25, 2012, in Juneau, Alaska. The Mendenhall Glacier can be seen in the background.

Credit: AP Photo/Becky Bohrer

Strollers walk past trees with colored leaves in Berlin's governmental district on October 2, 2012.

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Artist Lester Maurer contemplates fall colors in the balmy weather of early autumn as he works on an oil painting in the Whiteaker neighborhood Wednesday, October 3, 2012 in Eugene, Ore.